text: 'use strict';
  
  const S = require ('..');
  
  const eq = require ('./internal/eq');
  
  
  test ('isNothing', () => {
  
    eq (typeof S.isNothing) ('function');
    eq (S.isNothing.length) (1);
    eq (S.show (S.isNothing)) ('isNothing :: Maybe a -> Boolean');
  
    eq (S.isNothing (S.Nothing)) (true);
    eq (S.isNothing (S.Just (42))) (false);
  
  });
  